LD multi-select appears too eagerly

[Koopa1018]

Describe the bug
In the LD, clicking in the edit window instantly begins a multi-select action. Because of this, if I place a goomba and koopa right next to each other, it's hard to select just one because the select box immediately picks both.

To Reproduce

1. In the LD, place a goomba and a koopa right next to each other, close enough to touch. (Repro is easiest if goomba is on the left.)
2. Single-click to select the one on the left. Aim for the center, not the outer edge.

Expected behavior
Single-click never selects >1 object. Multi-select only begins when the pointer is dragged.

Screenshots

(Windows doesn't show the mouse cursor in screenshots, nngh 😒)

System Information

• OS/Browser: Windows 10, Godot editor 4.1
• Game version: Fix Level Designer bugs #286
• Other specs: